hydraulic press is a chemical term used to describe some kind of machineries that apply Pascal Law into the process of transporting matters with pressure of liquid. In order to fill different engineering needs, people produce quantities of hydraulic presses of various types. According to the type of the liquid that delivers liquid pressure, hydraulic presses can be divided into two categories : one of oil pressure and one of water pressure. Compared with oil pressing ones, water pressing machineries can produce higher liquid pressure, because of which they are widely used in the procedures of forging and pressing. Forging hydraulic presses can also be divided into fixed forging hydraulic ones and free forging hydraulic ones, which all function greatly in engineering.
hydraulic pressing machine are a kind of machines which use liquid as working medium to deliver energy to accomplish different industrial crafts. In addition to forging press forming outside, they can also be used in the hydraulic pressure equipment, modification, packaging, blocks pressing and pieces linking, etc. To reduce the size of the equipment, large forging hydraulic presses commonly use high pressure (about 35 million mpa), and sometimes also use ultrahigh pressure which is more than 100 million mpa. Common work pressure is high enough to fill regular engineering needs.
In terms of the working principle, the Pascal Law is closely related. In accordance with this law, pressing can be regarded as a process in which engineering force is transformed into pressure which is what we need. The working medium functions not only to deliver pressure, but also to ensure the efficiency, stability and life span of the whole machinery. Thus, the working medium must have superior properties of floating, compressing and lubricating to be capable of solving practical problems.
In the light of their excellent engineering performance, forging hydraulic press have widespread applications in the fields of automotive, aviation, aerospace and pipeline. They are mainly suitable for components which are of single section hollow structure and change along the axis. The alien pipe fittings in the car exhaust system, engine brackets, dashboard stents, body frameworks, hollow shaft parts and complex fittings are all typical examples related. Applicable materials of hydraulic forming technology include carbon steels, stainless steels, aluminum alloys, copper alloys and nickel alloys, etc. These materials are always playing a vital role in automobile fitting factories, electrical equipment factories, heat treatment plants, vehicle accessory factories, air conditioner accessory factories and so on. Generally, they are indispensable in the current world.
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